Antislipping device.



Urr'nn 'STATES PATENT ormon- \\`ILLIA)I EDWARD PARTRIDGE, OF BIRMINGHAM, ENGLAND.

ANTISLIPPING Drayton.

Specication of Letters Patent.

Patented Aug. 6, 1907.

Applicitimi'iilegi February is', i907. srin No. 357,748.

'- means for thispurpose Which'shall vbe exceedingly isA cheapto manufacture, readily applied, and effectiveV in use.

The invention consists essentially in a plate of right angled isoscelestriangle shape provided with grooves running parallelvwith the short slides of the plate to meet at the apex -of the triangle; o'r instead oi the grooves, recesses may be formed with sharp deep edges towardthe apex so that the plate has great gripping power towards its apex'. The triangles may if preerred for ordinary. vuse or for heai'fier.fworg i'cast or termed in' a largerplate, being arranged alternately I with their bases and apices'in-'one direction.v

The most important use' probablyfor the-invention isior the; prevention of slcidding of vehicles' and for this purpose the platesare arranged on a band prefer'- ably in one or two rings alternately as to direction as before.vv The" plates are riveted to the band which may ybe o any suitable material,- such .as leather canvas, balata,` andthe latterv is then appliedY to the-wheel tire.

0n the drawings-Figure 1. is a plan view of a plate constructed in accordance with my invention with onegroove each' side. Fig. 2, is a section of the same taken near. the base of -the triangle. I Fig. 3. is an underside plan. Fig. 4. shows 'these studs arrangedon a I baudsecured to the tire. Figs. 5, 6, and 7. are similar views of asltiid having two grooves eachside. Fig. 8. shows, these'stu'ds secured to a non-skid band riveted to a protective band on the tire. Fig. 9. is a -plan of a plate formed with recesses with 'their deepest parts toward the apex of the triangle. v Fig. 10. is a section near the base of the triangle. Fig. 11. shows a plurality of the triangles arranged on a plate suitable for a twin wheel of abus. A Fig. 12. shows the'application o the plate. and Fig. 13. 'shows the triangular plates used as treads for stairs.'

In carrying the invention into practice as applied to` the prevention of skidding of wheel tires as illustrated at Figs. 1', 21, 3, and'4, thepplate a is preferably cast in 'formed with grooves 'c; theseare pronounced and run parallel with the short sides of the plate meeting on a perpendiciilar line from the apex to the center ofthe base, as clearly seen at Fig. 1. The grooves c are shape'djatl a gradual slope on one side d but with a sudden vertical face e'on the outer side, that is the one nearest the short side of the plate as will be understood from reference tofFig. 2. Thegrooves leave ribs on the platel and Ithese ribs would allow skidding in the direction toward' the gradually sloping side but` would prevent it in a direction toward the sharp vertical side. Being arranged oppositely and meeting' at a point, when on a road these ribs absolutcly'prevent skidding in a directionfrom the apex, sho'wn by an be compressed in the grooves and'relative movement would tend to further compress this toward the apex` .The plate is riveted to a band or to thetire direct by means ofthe prongs b and in the4 case of la band -this may be secured to the tire by riveting.

, I have found it very 'Convenient in practice to cm-v ploy balata fior the band, constructing it in several layers -solutioned firmly together; to this band the plates a are riveted in alternate directions, being pref# erablyarranged brokenor unbroken rings as seen at Fig.` l.; I then apply the band f to the tire gby stitching ina suitable machine with a solutioned thread. The stitching may be carried out inl particular ways to give greater strength and in applying subsequent bands to the old tirel would be carried out on different lines to avoid working on the same places.

At Fig. 4. the plates a are riveted to a` band f which is stitched to the ,cover of the tire g.

In the arrangement shown at Figs. 5 to 8.l the 'plate is constructed in exactly the same way except that an additional groove iis used on each side. These plates are shown riveted in a single brokenring on a'band f riveted to a protecting band j on-the cover of the tire g. But in the securing ofthe plateson the tire any method may be used or they may be riveted direct to the cover or molded thereon.V While if desired, the triangles of hard rubber are molded with the tire forming a part-of the cov-er itself.

In the modified form of plate shown at Figs. 9. and 10, the grooves are dispensed with and shaped recesses lc formed in their place. These recesses are deep at their ends l and shallow at their ends fm so thatany movement in the direction indicated by. the'arrow is strongly resisted when the plate is in contact with the road surface. I With heavier vehicles, plates of the form shown at 4heavy motor-vehicles. The triangles are cast in the plate with sets of'groovee in alternatedirections, and

' arrow, as the material of the surface of the road would are. arranged in twoliars n connected hy cross pieces o whirh may be. rigid or hinged, but, are preferably formed iviih a recess p to receive a` Cable or chain q for securing a series of plates in position roundl the wheel as seen at Fig. i2. 'l i Ai. Fig. 13, the plates are shown applied as treads LO stairs. In this Case L'Woltriangles would preferably be formed into one square, astliis would he easier for lit- Ling in the stair. v The Squares would thus be arranged so that the triangles are opposite in direeion as before; and vvhen so arranged provide a very effeetive'non lslipping tread.

a' triangular plate with grooves :riveting on a perpendicular line frein the apex t0 the middle of the hase, the larrooves havingr one gradually sloping,r wall and one vertical wall with a Sharp edge.' Y

In anti-slippingmeans for vehicle tires. rings a1'- `raneed around a vehicle tire and each ring' eoinprisiny,r trianguiar plates with depressions haviingr sharp edges teward the apex of the plate and arranged alternately with their apiees and bases inthe same direction.

4. An anti-slippingr means for vehifle tiresy eonsiatiner of a cover for a vehicle tire and a band of halata stitched to said cover` said hand being: provided with rings arranged therearoimd and each ring comprising groved triangular plates arrangk-tl alternately with their apees and bases in the saine direction.`

In testimony whereof, 1' have signed my name to this specification in the presence of two Subscribing witnesses. 

